For getting admission into the bams course you need to qualify the NEET cutoff. As the admission is dependent on your NEET score.
After completion of 10+2 with minimum of 65% marks you need to write the national entrance exam conducted by NTA and should qualify the cutoff provided for the specified category then you are eligible for bams ug courses. Even for the private colleges you need to qualify NEET.
Hope this helps you out. Good luck